It is a great pleasure to welcome you to the 39th International Cosmic Ray Conference (ICRC 2025) in Geneva, Switzerland. The ICRC conferences are held biennially since 1947 by the Commission C4 ...

Louis Lyons traces the origins of the “five sigma” criterion in particle physics, and asks whether it remains a relevant marker for claiming the discovery of new physics.

In the summer of 1968, while a visitor in CERN’s theory division, Gabriele Veneziano wrote a paper titled “Construction of a crossing-symmetric, Regge behaved amplitude for linearly-rising ...

The heavy-ion physics programme at LHC Run 3 will provide deep insights into the rich field of QCD phenomenology.

Patrick Koppenburg and Marco Pappagallo survey the 23 exotic hadrons discovered at the LHC so far. Twenty-three exotic states Five pentaquarks and 18 tetraquarks have been discovered so far at the LHC ...

Technology originally developed for high-energy physics is being used to develop a novel medical linear accelerator for radiotherapy in low- and middle-income countries.

Frontier instruments like the LHC and its detectors not only push back the boundaries of our knowledge, but also catalyse innovative technology for medical applications, writes Manuela Cirilli.

The past seven decades have seen remarkable cultural and technological changes. And CERN has been no passive observer. From modelling European cooperation in the aftermath of World War II to ...

20 years since coining the string-theory "landscape", Leonard Susskind describes the emerging connections between quantum mechanics and gravity.

Steven Weinberg talks to CERN Courier about his seminal 1967 work and discusses where next for particle physics following the discovery of the Higgs boson.

What was it that drove one of the biggest media events science has ever seen, and is the LHC still able to capture the public imagination?

Rolf Widerøe operates one of his betatrons in 1953. Credit: Av Verdens Gang/NTB Scanpix The betatron is an early type of MeV-range electron accelerator which uses the electric field induced by a ...